#include<bits/stdc++.h>
#define ll long long
#define ull unsigned long long
using namespace std;

const int N = 1e6 + 10, INF = 0x3f3f3f3f;

int n;

void solve()
{
    stack<int> st; set<int> s;
    cin >> n;
    for (int i = 1;i <= n * 2;i++) {
        int x;cin >> x;
        if (s.count(x) == 0) { st.push(x);s.insert(x); } else {
            while (!st.empty()) {
                int t = st.top();
                st.pop();
                s.erase(t);
                if (t == x)break;
            }
        }
    }
    if (st.size() == 0) cout << "Yes\n";
    else cout << "No\n";
}

signed main()
{
    // ios::sync_with_stdio(0);
    // cin.tie(0);cout.tie(0);
#define ONLINE_JUDGE
#ifndef ONLINE_JUDGE
    std::istringstream in(R"()");
    std::cin.rdbuf(in.rdbuf());
#endif
    int T = 1;
    cin >> T;
    for (int i = 1;i <= T;i++) {    
        solve();
    }
}